As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSTALLATION OF NEW TANK, IT WAS DISCOVERED THAT THE BUNGS FOR INSTALLING THE FUEL STRAINER ASSEMBLIES HAVE BEEN BRAZED TO THE TANK INVERSELY. THE BUNG THAT SHOULD HAVE BEEN BRAZED AT THE AFT LOCATION WAS BRAZED IN THE FORWARD MOUNT WAS BRAZED IN THE AFT MOUNT. (K)